"use strict";

// Layer: ui/physics-shape-editor
// Shared button labels/templates for rotator, reciprocator, and poison-block
// segment editors.  Low-level editor pointer behavior remains in placement log.
(function (global) {
  const MODE_LABELS = Object.freeze({
    line: "📏 直線",
    free: "✎ 自由描画",
    erase: "⌫ 消しゴム",
  });
  const TEMPLATE_LABELS = Object.freeze({
    bar: "┃ 棒",
    cross: "＋ 十字",
    circle: "○ 円",
  });
  const ACTION_LABELS = Object.freeze({
    undo: "↶ 一つ戻す",
    clear: "🗑 全消し",
  });
  function templateSegments(name) {
    if (name === "bar") return [[-130, 0, 130, 0]];
    if (name === "cross") return [[-118, 0, 118, 0], [0, -90, 0, 90]];
    if (name === "circle") {
      const segments = [];
      const n = 18, r = 108;
      for (let i = 0; i < n; i += 1) {
        const a = i / n * Math.PI * 2;
        const b = (i + 1) / n * Math.PI * 2;
        segments.push([Math.cos(a) * r, Math.sin(a) * r, Math.cos(b) * r, Math.sin(b) * r]);
      }
      return segments;
    }
    return null;
  }
  function decorateToolbar(dialog, prefix = "rotator") {
    if (!dialog) return false;
    for (const btn of dialog.querySelectorAll(`[data-${prefix}-mode]`)) {
      const key = btn.dataset[`${prefix}Mode`];
      if (MODE_LABELS[key]) { btn.textContent = MODE_LABELS[key]; btn.title = MODE_LABELS[key].replace(/^[^\s]+\s*/, ""); }
    }
    for (const btn of dialog.querySelectorAll(`[data-${prefix}-template]`)) {
      const key = btn.dataset[`${prefix}Template`];
      if (TEMPLATE_LABELS[key]) { btn.textContent = TEMPLATE_LABELS[key]; btn.title = TEMPLATE_LABELS[key].replace(/^[^\s]+\s*/, ""); }
    }
    const undo = dialog.querySelector(`#${prefix}Undo`);
    const clear = dialog.querySelector(`#${prefix}Clear`);
    if (undo) undo.textContent = ACTION_LABELS.undo;
    if (clear) clear.textContent = ACTION_LABELS.clear;
    return true;
  }
  function pointSegmentDistance(p, seg) {
    if (!p || !Array.isArray(seg) || seg.length < 4) return Infinity;
    const x1 = Number(seg[0]) || 0, y1 = Number(seg[1]) || 0;
    const x2 = Number(seg[2]) || 0, y2 = Number(seg[3]) || 0;
    const dx = x2 - x1, dy = y2 - y1;
    const lenSq = dx * dx + dy * dy;
    if (lenSq <= 0.0001) return Math.hypot(p.x - x1, p.y - y1);
    const u = Math.max(0, Math.min(1, ((p.x - x1) * dx + (p.y - y1) * dy) / lenSq));
    return Math.hypot(p.x - (x1 + dx * u), p.y - (y1 + dy * u));
  }
  global.TarinaiPhysicsShapeEditorSystem = Object.freeze({
    decorateToolbar,
    templateSegments,
    pointSegmentDistance,
  });
})(typeof window !== "undefined" ? window : globalThis);